To the Editor:—In the summary in The Journal (Foreign Letters, Nov. 3, 1956, page 1001) of the report of a working party on anesthetic explosives, there are errors in the passage about operating theater floors which give the impression that such floors should be nonconducting. It is suggested that the words "without such floors" should read "with such floors," "a new, nonconductive floor" should read "a new, conductive floor," and "nonconducting paint" should read "conducting paint." The whole passage would then read:"Only 5-10% of operating rooms in Great Britain have nonconducting floors ( rubber or cork ). In operating rooms with such floors the danger of explosion can be decreased by dampening the floor or by putting a damp sheet down if evaporation is rapid. If explosive anesthetics are used routinely, the only safe procedure is to lay a new, conductive floor. The use of conducting paints for floors is